code: def load_checkpoint(self):
      self.tuner.load_checkpoint()
      if self.assessor is not None:
          self.assessor.load_checkpoint()
  
imports: import logging
  from collections import defaultdict
  from nni import NoMoreTrialError
  from nni.assessor import AssessResult
  from .common import multi_phase_enabled
  from .env_vars import dispatcher_env_vars
  from .msg_dispatcher_base import MsgDispatcherBase
  from .tuner_command_channel import CommandType
  from ..common.serializer import dump, load
  from ..utils import MetricType
label_desc: Use image node_id 2 for calling the MsgDispatcher obj's underlying member method code with example usage: obj.load_checkpoint() without return types